CN101582652A - High-dynamic high-power bridge-type piezoceramics driving power with signal generator - Google Patents
High-dynamic high-power bridge-type piezoceramics driving power with signal generator Download PDFInfo
- Publication number
- CN101582652A CN101582652A CNA2009100723758A CN200910072375A CN101582652A CN 101582652 A CN101582652 A CN 101582652A CN A2009100723758 A CNA2009100723758 A CN A2009100723758A CN 200910072375 A CN200910072375 A CN 200910072375A CN 101582652 A CN101582652 A CN 101582652A
- Authority
- CN
- China
- Prior art keywords
- power
- unit
- bridge
- amplifier module
- signal generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention provides a high-dynamic high-power bridge-type piezoceramics driving power with a signal generator, comprising a signal generating unit, a power amplifier module and an MCU unit, wherein, the signal generating unit is connected with the power amplifier module via the MCU unit so as to realize control functions of a keyboard, liquid crystal and the like; power amplifier module output drives a PZT actuator, and the MCU unit is also connected with the keyboard, the liquid crystal and a serial port; the power amplifier module is connected with an analog input unit, the MCU unit and the power amplifier module are respectively connected with a protective circuit, and the signal generating unit, the power amplifier module and the MCU unit are respectively connected with a power supply source unit. The invention can be used in application scopes such as fine spark machining and the like, which have high requirements on movement and power; a signal generating unit can be self-provided by FPGA, signal is amplified by a bridge-type circuit so as to realize functions of high-dynamic high-power output, etc.
Description
(1) technical field
What the present invention relates to is the field of power supply, and being specifically related to a kind of application is the drive pressure electroceramics, is a kind of driving power of capacitive micro-actuator.
(2) background technology
Piezo-ceramic micro displacement unit has that volume is little, displacement resolution is high, frequency response is high, noiseless, characteristics such as do not generate heat, and is a kind of desirable micrometric displacement element.Continuous development along with science and technology, the category that we studied has also developed into microcosmos from macrocosm, and piezoelectric ceramic actuator has just in time adapted to the needs of this development, so all competitively carry out the drive power supply for piezoelectric ceramics Study on Technology countries in the world.The Piezoelectric Ceramic method of broad research mainly contains driven and current drives at present.Its open loop control of current driving method is linear good, and carrying load ability is strong, bandwidth, but low-frequency stability is poor, has the electric charge leakage, output voltage is saturated and problems such as difficulty are controlled in null drift.Though and voltage drive method has stability and static characteristic preferably, but under the high-speed motion condition, its carrying load ability significantly descends, and its closed loop frequency response bandwidth lower (1Kz is following) is widely used in fuel of internal combustion engine at present piezoelectric ceramic and sprays, in the complex environments such as meticulous spark machined, not only locating accuracy there is certain requirement, requirement for dynamic property and power also is more and more higher, and high dynamic and high-power output is comparison contradiction, and therefore how solving this contradiction has important significance for theories and practical value.
(3) summary of the invention
The object of the present invention is to provide a kind of can be used in meticulous spark machined etc. to dynamically and power requirement close than high field, adopt FPGA to realize carrying signal generating unit, and adopt bridge circuit to carry out signal and amplify, realize the high-dynamic high-power bridge-type drive power supply for piezoelectric ceramics that carries signal generator of high-dynamic high-power output.
The object of the present invention is achieved like this: it comprises signal generating unit, 3 parts of power amplifier module and MCU unit; adopt the MCU unit to be connected in the middle of signal generating unit and the power amplifier module and realize controlled function such as keyboard liquid crystal; power amplifier module output drives the PZT actuator; the MCU unit also is connected with keyboard, liquid crystal and serial ports; power amplifier module connects the simulation input unit; the MCU unit is connected protective circuit respectively with power amplifier module, and signal generating unit, power amplifier module and MCU unit are connected power supply unit respectively.
The present invention also has some technical characterictics like this:
1, described signal generating unit comprises the digital signal generator based on DDS, and digital signal generator comprises accumulator, data latches, wave memorizer and the DA conversion equipment that connects successively;
2, described power amplification unit adopts bridge-type rate structure for amplifying, connects with two amplifier bridge-types;
3, described signal generating unit adopts prime main amplifier and back level unit gain inverting amplifier to form bridge circuit, and voltage conversioning rate and power output are promoted one times, has reduced the supply power voltage of amplifier simultaneously, adopts the positive negative bipolar low-voltage power supply.
System of the present invention also adopts voltage detecting, electric current restriction and temperature protection unit; guarantee the fail safe of system when high-power output; the present invention can select analog signal input and signal generating unit signal input dual mode by liquid crystal and keyboard operation; input signal amplifies output, capacitive loads such as drive pressure electroceramics through power amplifier module.Through evidence, designed piezoelectric driving power of the present invention can improve the power of output effectively under the prerequisite of the bandwidth of operation that guarantees a broad, and the power output that has solved conventional piezoelectric ceramic driving power supply is with the contradiction between the bandwidth.
(4) description of drawings
Fig. 1 is the principle topological diagram of power supply;
Fig. 2 is a modified model DDS principle topological diagram;
Fig. 3-Fig. 4 is not for adding the 1Hz and the 1KHz sine waveform schematic diagram of filter output;
Fig. 5-Fig. 6 is not for adding the 1Hz and the 1KHz triangular wave waveform schematic diagram of filter output;
Fig. 7-Fig. 8 is not for adding the 1Hz and the 1KHz sawtooth waveforms waveform schematic diagram of filter output;
Fig. 9-Figure 10 is 100Hz and the 20KHz sine waveform schematic diagram that adds filter output;
Figure 11-Figure 12 is 100Hz and the 20KHz triangular wave waveform schematic diagram that adds filter output;
Figure 13-Figure 14 is 100Hz and the 20KHz sawtooth waveforms waveform schematic diagram that adds filter output;
Figure 15 is the principle schematic of bridge-type power amplification;
Figure 16 is the unloaded dynamic characteristic schematic diagram of 206Hz for frequency;
Figure 17 is the unloaded dynamic characteristic schematic diagram of 8.5KHz for frequency;
Figure 18 is the unloaded dynamic characteristic schematic diagram of 24KHz for frequency;
Figure 19-Figure 20 is that the band that 1KHz and 3KHz are output as 60V carries the characteristic schematic diagram for frequency;
Figure 21-Figure 22 is that the band that 1KHz and 3KHz are output as 80V carries the characteristic schematic diagram for frequency.
(5) embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments:
1, principle topology of the present invention is as shown in Figure 1:
It is the whole system power supply that present embodiment adopts Switching Power Supply, and delivery efficiency can reach more than 90%.Whole system is divided into 3 parts, signal generating unit, and power amplifier module middle adopt the MCU unit to connect and realizes controlled function such as keyboard liquid crystal, and power amplifier module is exported the PZT actuator is driven.This system also adopts voltage detecting, and functions such as electric current restriction and temperature protection are guaranteed the fail safe of system when high-power output.
2, based on the digital signal generator of DDS
Drive power supply for piezoelectric ceramics needs to utilize various dynamic waveforms (waveforms such as sine, triangle, sawtooth) as input signal in dynamic application.Generally can adopt signal generator as input, but its volume is too big and cost is higher; Also can adopt the PC stored waveform, utilize serial ports or parallel port etc. to be transferred to slave computer then and produce waveform, but its speed is subjected to the transmission speed restriction of serial ports etc.At the dynamic application of piezoelectric ceramic actuator, utilize the DDS technology, designed the controlled waveform output module of drive power supply for piezoelectric ceramics.This module can be adjusted the frequency and the amplitude of output voltage waveforms, provides the signal source thereby use under the high speed dynamic condition for drive power supply for piezoelectric ceramics, also is further integrated the laying the foundation of drive power supply for piezoelectric ceramics simultaneously.
Fig. 2 is the modified model signal generator that adopts in the present embodiment, carry out data accumulation according to frequency control word in the accumulator, deposit the value after adding up in the M data register, value in the data register is divided into two parts, add up as a mould in low N position, export waveform as the addressing address of EEPROM high M-N position, like this, just can control the speed of low N position delivery by the control frequency control word, just to the speed of high M-N position carry, influence addressing speed thus, realize purpose the FREQUENCY CONTROL of output waveform to EEPROM.The output waveform of data signal generator such as Fig. 3-shown in Figure 8.
A few width of cloth pictures of Fig. 3-Fig. 8 are that DDS exports the output when not adopting filtering, examine and can find, switching noise (burr) is clearly arranged on the waveform, more obvious under the situation of high frequency, after the employing second-order low-pass filter filtered output, improvement clearly took place.
4, power amplifier unit
The output of the linear circuit of tradition is subjected to the influence of gain bandwidth product, and power output and frequency are conflicting.The design adopts the bridge-type drive principle, and output gain is the gain sum of the anti-phase gain amplifier of gain of prime main amplifier and back level unit, and the advantage of this type of drive is:
(1) connect with two amplifier bridge-types, its output voltage is the twice of single amplifier, and bridge circuit is unique mode that can realize bipolarity output under single supply.Or the output that needs amplifier lower at supply voltage near supply voltage an amplifier enough big output can not be provided is to adopt sort circuit very meaningful. simultaneously because output voltage is the twice of single amplifier, so its power output has also increased by one times than single amplifier.
(2) switching rate is doubled,, therefore can reduce second harmonic distortion on two amplifiers than single amplifier owing to be non-linear symmetric.
(3) because the output voltage of bridge circuit is the twice of single amplifier, but implementation is to realize with two amplifiers, therefore the voltage amplification that realizes on the basis of the bandwidth that does not influence the single-stage amplifier is so its frequency response exceeds much with respect to drive power supply for piezoelectric ceramics commonly used.
The principle of bridge-type power amplifier unit part as shown in figure 15.The output of bridge amplification circuit is shown in Figure 16-18 during analog input.
Present embodiment adopts unloaded, sinewave output dynamic tracking 0-80V, frequency range 200Hz-25KHz, wherein not decay (80V) of 200Hz-8.5KHz output waveform, 8.5KHz-25KHz output voltage values is decayed to some extent, peak-to-peak value is 76V during 10KHz, and peak-to-peak value decays to 34V during 25KHz.This mainly is because driving power is compensated, and is stable to sacrifice the output of multiplication factor acquisition system.In conjunction with Figure 19-Figure 22, adopt and carry the signal generator input signal, the half-bridge output that utilizes the bridge-type power amplification circuit to amplify.
Claims (4)
1; a kind of high-dynamic high-power bridge-type drive power supply for piezoelectric ceramics that carries signal generator; it comprises signal generating unit; 3 parts in power amplifier module and MCU unit; it is characterized in that adopting the MCU unit to be connected in the middle of signal generating unit and the power amplifier module and realizing keyboard; the liquid crystal controlled function; power amplifier module output drives the PZT actuator; the MCU unit also is connected with keyboard; liquid crystal and serial ports; power amplifier module connects the simulation input unit; the MCU unit is connected protective circuit, signal generating unit respectively with power amplifier module; power amplifier module is connected power supply unit respectively with the MCU unit.
2, the high-dynamic high-power bridge-type drive power supply for piezoelectric ceramics that carries signal generator according to claim 1, it is characterized in that described signal generating unit comprises the digital signal generator based on DDS, digital signal generator comprises accumulator, data latches, wave memorizer and the DA conversion equipment that connects successively.
3, the high-dynamic high-power bridge-type drive power supply for piezoelectric ceramics that carries signal generator according to claim 2 is characterized in that described power amplification unit adopts bridge-type rate structure for amplifying, connects with two amplifier bridge-types.
4, the high-dynamic high-power bridge-type drive power supply for piezoelectric ceramics that carries signal generator according to claim 3, it is characterized in that described signal generating unit adopts prime main amplifier and back level unit gain inverting amplifier to form bridge circuit, voltage conversioning rate and power output are promoted one times, reduce the supply power voltage of amplifier simultaneously, adopted the positive negative bipolar low-voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100723758A CN101582652A (en) | 2009-06-26 | 2009-06-26 | High-dynamic high-power bridge-type piezoceramics driving power with signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100723758A CN101582652A (en) | 2009-06-26 | 2009-06-26 | High-dynamic high-power bridge-type piezoceramics driving power with signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101582652A true CN101582652A (en) | 2009-11-18 |
Family
ID=41364654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100723758A Pending CN101582652A (en) | 2009-06-26 | 2009-06-26 | High-dynamic high-power bridge-type piezoceramics driving power with signal generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101582652A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495653A (en) * | 2011-12-15 | 2012-06-13 | 苏州大学 | Driving power supply of silicon-based micro-positioning platform |
| CN104135265A (en) * | 2014-08-07 | 2014-11-05 | 金陵科技学院 | Design method of inductive load driving circuit and circuit thereof |
| CN104485924A (en) * | 2014-12-02 | 2015-04-01 | 上海电机学院 | Multi-path high-power high-frequency signal generator used for piezoelectric ceramics |
| CN106487349A (en) * | 2016-11-28 | 2017-03-08 | 哈尔滨工业大学 | A kind of grounding type piezoelectric ceramics charge drivers with compound low frequency channel |
| CN110543203A (en) * | 2019-08-22 | 2019-12-06 | 中国船舶重工集团公司第七0七研究所九江分部 | low-frequency constant-current excitation circuit for electromagnetic log excitation system |
-
2009
- 2009-06-26 CN CNA2009100723758A patent/CN101582652A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495653A (en) * | 2011-12-15 | 2012-06-13 | 苏州大学 | Driving power supply of silicon-based micro-positioning platform |
| CN104135265A (en) * | 2014-08-07 | 2014-11-05 | 金陵科技学院 | Design method of inductive load driving circuit and circuit thereof |
| CN104485924A (en) * | 2014-12-02 | 2015-04-01 | 上海电机学院 | Multi-path high-power high-frequency signal generator used for piezoelectric ceramics |
| CN106487349A (en) * | 2016-11-28 | 2017-03-08 | 哈尔滨工业大学 | A kind of grounding type piezoelectric ceramics charge drivers with compound low frequency channel |
| CN106487349B (en) * | 2016-11-28 | 2019-03-29 | 哈尔滨工业大学 | A kind of grounding type piezoelectric ceramics charge drivers with compound low frequency channel |
| CN110543203A (en) * | 2019-08-22 | 2019-12-06 | 中国船舶重工集团公司第七0七研究所九江分部 | low-frequency constant-current excitation circuit for electromagnetic log excitation system |
| CN110543203B (en) * | 2019-08-22 | 2020-12-15 | 中国船舶重工集团公司第七0七研究所九江分部 | Low-frequency constant-current excitation circuit for electromagnetic log excitation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101582652A (en) | High-dynamic high-power bridge-type piezoceramics driving power with signal generator | |
| CN101394166B (en) | Triangle wave generating circuit, pulse width modulation circuit and audio power amplifying circuit | |
| Tang et al. | Design and experimental analysis of self-sensing SSDNC technique for semi-active vibration control | |
| CN104501885A (en) | Jet principle-based high-precision low-power consumption natural gas flow measuring method and device | |
| CN203617976U (en) | Touch type multichannel random wave generator | |
| CN202710718U (en) | Circulation transmission point measurement parameter output device based on PWM | |
| CN102263537A (en) | Control circuit of linear motor of mobile terminal | |
| CN110086464A (en) | Digital feedback analog signal isolating transmission circuit | |
| CN108414790A (en) | Aero-engine speed probe simulator based on DDS and method | |
| CN104539299B (en) | Small-sized underwater low-frequency acoustic transmitter | |
| CN203132837U (en) | Portable vehicle-engine failure diagnosis tester for armed police | |
| Shi et al. | Design, simulation and experiment for a piezoelectric energy harvester based on fluid pressure pulsation in water hydraulic system | |
| CN203350841U (en) | Charge compensation type mutual capacitance sensing circuit | |
| CN204993261U (en) | Linear amplifier circuit of on -vehicle audio frequency of single power low -voltage work | |
| CN101132156B (en) | Piezoelectric ceramic driving circuit used for optical fiber stress adjustment | |
| CN204612690U (en) | High-precision air pressure type height indicator | |
| CN101714821B (en) | Excitation power circuit of rotary transformer | |
| CN207602215U (en) | Buzzer drive circuit | |
| CN203643489U (en) | Signal generator | |
| CN109269579B (en) | Intrinsic safety turbine signal detection circuit and implementation method | |
| CN209878685U (en) | STM32F 407-based ultrasonic guided wave signal generator | |
| CN203516051U (en) | Diaphragm jig frequency detection system | |
| CN103812476B (en) | Sine wave pulse width adjusting controller | |
| CN201532394U (en) | Engine speed sensor frequency doubling device | |
| CN201608691U (en) | Wave-shaped converter capable of changing square wave pulse width and amplitude value |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20091118 |